I'm running Steam through Wine and trying to run CSGO but I get an error for no CSM support because I use an ATI graphics card 7800 series. I've read about similar problems people were having and their solution was to mask the graphics card info by editing steam prefixed wine registry and altering VideoPciVendorID and VideoPciDevice IDs. I've tried this but the system information on steam hasn't changed, and I continue to get this error. So clearly I'm doing something wrong. Is there a way to stop steam from detecting this info at all?

Wine is 1.7.2 btw.

This is a result from a sudo apt-get update:

Err http://ppa.launchpad.net trusty/main amd64 Packages
404 Not Found
Ign http://us.archive.ubuntu.com trusty/multiverse Translation-en_US
Ign http://us.archive.ubuntu.com trusty/restricted Translation-en_US
Ign http://us.archive.ubuntu.com trusty/universe Translation-en_US
Err http://ppa.launchpad.net trusty/main i386 Packages
404 Not Found
W: Failed to fetch http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.